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<div class="title"><a class="el" href="classADF4351.html" title="ADF4351 chip device driver. ">ADF4351</a> Arduino library driver for Wideband Frequency Synthesizer </div>  </div>
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<div class="textblock"><h1><a class="anchor" id="intro_sec"></a>
Introduction</h1>
<p>The <a class="el" href="classADF4351.html" title="ADF4351 chip device driver. ">ADF4351</a> chip is a wideband freqency synthesizer integrated circuit that can generate frequencies from 35 MHz to 4.4 GHz. It incorporates a PLL (Fraction-N and Integer-N modes) and VCO, along with prescalers, dividers and multipiers. The users add a PLL loop filter and reference frequency to create a frequency generator with a very wide range, that is tuneable in settable frequency steps.</p>
<p>The <a class="el" href="classADF4351.html" title="ADF4351 chip device driver. ">ADF4351</a> chip provides an I2C interface for setting the device registers that control the frequency and output levels, along with several IO pins for gathering chip status and enabling/disabling output and power modes.</p>
<p>The <a class="el" href="classADF4351.html" title="ADF4351 chip device driver. ">ADF4351</a> library provides an Arduino API for accessing the features of the ADF chip.</p>
<p>The basic PLL equations for the <a class="el" href="classADF4351.html" title="ADF4351 chip device driver. ">ADF4351</a> are:</p>
<p><img class="formulaInl" alt="$ RF_{out} = f_{PFD} \times (INT +(\frac{FRAC}{MOD})) $" src="form_0.png"/></p>
<p>where:</p>
<p><img class="formulaInl" alt="$ f_{PFD} = REF_{IN} \times \left[ \frac{(1 + D)}{( R \times (1 + T))} \right] $" src="form_1.png"/></p>
<p><img class="formulaInl" alt="$ D = \textrm{RD2refdouble, ref doubler flag}$" src="form_2.png"/></p>
<p><img class="formulaInl" alt="$ R = \textrm{RCounter, ref divider}$" src="form_3.png"/></p>
<p><img class="formulaInl" alt="$ T = \textrm{RD1Rdiv2, ref divide by 2 flag}$" src="form_4.png"/></p>
<h1><a class="anchor" id="dependencies"></a>
Dependencies</h1>
<p>This library uses the BigNumber library (included) from Nick Gammon</p>
<h1><a class="anchor" id="author"></a>
Author</h1>
<p>David Fannin, KK6DF</p>
<h1><a class="anchor" id="license"></a>
License</h1>
<p>MIT License </p>
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